APC UPS BE650G2-GR with QNAP TS-464 – experiences?

English Compatibility
1

Hi,

I recently replaced my older APC BE550G with a new APC BE650G2-GR, connected via USB to my QNAP TS-464.

The UPS is correctly detected by QTS and works normally. However, I have occasionally seen a brief USB communication interruption in the QNAP system log:

“USB UPS unplugged”
followed approximately one minute later by
“USB UPS plugged in”

This does not happen continuously. So far it has occurred only occasionally, at most a few times per day, and the NAS continues running normally. The UPS also continues to provide power; only the USB communication appears to be interrupted temporarily and then recovers automatically.

I have already tried:

  • a direct connection to a USB 2.0 port on the TS-464
  • the original APC USB cable
  • an older APC USB cable with a ferrite filter

My previous APC BE550G worked reliably with the same TS-464 for more than a year without these USB disconnect/reconnect events.

I am aware that the BE650G2-GR is not currently listed in QNAP’s official UPS compatibility list. However, I noticed that some of the APC models listed there are older models that are no longer in production, so I am particularly interested in real-world experience with newer APC models.

Is anyone here using an APC BE650G2-GR with a QNAP TS-464 or another recent QNAP NAS?

If so, I’d be interested to know:

  • Does QTS recognize the UPS correctly?
  • Have you experienced occasional USB disconnect/reconnect events?
  • How long have you been using this combination?
  • Which QTS version are you running?

I’m mainly trying to determine whether this is a known or commonly observed behavior with this APC/QNAP combination, rather than a problem with my individual UPS.

Thanks!

2

I have seen this myself with cyberpower UPS.

There was plenty of discussions about it in the old forum, try a powered USB hub in between.

3

I’m not familiar with the new UPS yet. But you’ll probably have to connect it to the PC at some point and check the settings there. Maybe the UPS runs a self-test or something similar from time to time.

4

There is actually a topic here as well

5

Could you first try adding a powered USB hub, as suggested by other members here? If that resolves the issue — or if you run into anything else — feel free to let us know. Thanks!

6

Yes, I already ordered a powered 2.0 hub, I will try it. Meanwhile I asked Qnap to put my APC UPS model on the compatibility list to support officially however it can take a while, I saw on the list many UPS devices already old and outdated…